828778696704 has 156 divisors (see below), whose sum is σ = 2735952053536. Its totient is φ = 236793839616.

The previous prime is 828778696703. The next prime is 828778696723. The reversal of 828778696704 is 407696877828.

It is a super-2 number, since 2×828778696704² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (828778696703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1347814 + ... + 1863909.

Almost surely, 2^828778696704 is an apocalyptic number.

828778696704 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

828778696704 is an abundant number, since it is smaller than the sum of its proper divisors (1907173356832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

828778696704 is a wasteful number, since it uses less digits than its factorization.

828778696704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211760 (or 3211735 counting only the distinct ones).

The product of its (nonzero) digits is 455196672, while the sum is 72.

The spelling of 828778696704 in words is "eight hundred twenty-eight billion, seven hundred seventy-eight million, six hundred ninety-six thousand, seven hundred four".